Author: Ramdev

2

Unix Admin Reference – RAID ( Redundant Array of Independent Disks )

  1.  What is RAID?   RAID is an acronym for Redundant Array of Independent Disks. A RAID system consists of an enclosure containing a number of disk volumes,    connected to each other and to one or more computers by a fast  interconnect. Six levels of RAID are...

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working with Linux runlevels

When the system boots up, it queries for the default runlevel, which is defined in  the /etc/inittab file. When that default runlevel is located, the system boots into that particular runlevel. The different runlevels are essentially “states,” which allow services to be started or stopped depending...

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VxVM Troubleshooting – Procedure to Replace Internal FibreChannel (FC) Disks controlled by VxVM

Hot swapping of a failed disk is fairly straight procedure if the disks are regular SCSI disks, but for the Fibre Channel (FC) disks we should follow different procedure for hot swaping. Below specific procedure should be used when replacing one of the internal disks in...

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Using "asr-disable" to disable PCI slots from OK prompt – Servers V440 or V490

System Administrators encounter frequent issues with onboard PCI slots after the maintenance operations like the OS upgrades, patch installations and firmware upgrades. And often it will leave us in a situation that we couldn’t  boot up the machine, because of the issues to recognize PCI slots after...

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